Most important, regardless of the season you’ve chosen to visit any city of Europe, make sure you stay downtown! It doesn’t matter if your choice is a hotel or rent apartment, downtown is always the most convenient area as a base to any visitor, especially one who is not well familiar with the city areas.
Second, make sure you dedicate lots of hours to walk and explore the city. It’s the only certain way that you will not miss any important sights plus you’ll get a firsthand taste of the people who live here and how they usually spend their days.
Third, make sure you get well informed about what you are interested to visit. Check Google maps as well as certain travel apps that you trust, and make a plan in advance about where you want to go. Save the routes to your mobile or tablet and you can be certain never to get lost!
Fourth, check about the old town as most European cities feature such a one! Stroll along the narrow streets of the old town to admire the architecture of another era and get swept up by the charm of the past!
Last but not least, make sure you dedicate a day to explore the local cuisine and tastes, favorite to the locals. You will be surprised by the unique recipes and new flavors and delicacies you will discover.
Be a true explorer once you visit any European city! Get to know new places and things, take a million pictures, shop at local stores for souvenirs and allow yourself to get excited and enjoy your trip like a child in a toys store!